|Year|Title|Role|Notes|
|---|---|---|---|
|1989–1993|Short Attention Span Theater|Host|Co-Presented four seasons|
|1993–1995|The Jon Stewart Show|Host|Creator, Executive producer, Writer|
|1996|The Larry Sanders Show|Himself|6 episodes from 1996-1998|
|1997|The Nanny|Bobby|Episode: "Kissing Cousins"|
|1997|NewsRadio|Andrew|Episode: "Twins"|
|1997|Dr Katz, Professional Therapist|Jon|Voice, Episode "Guess Who"|
|1997|Space Ghost Coast to Coast|Himself|Episode: "Mayonnaise"|
|1997|Mr. Show|Himself|Episode: "A White Man Set Them Free"|
|1998|Elmopalooza|Himself|TV Special|
|1999|Spin City|Parker|Episode: "Wall Street"|
|1999–present|The Daily Show|Host|Executive producer, Writer|
|2001|43rd Annual Grammy Awards|Host|TV Special|
|2002|44th Annual Grammy Awards|Host|TV Special|
|2002|Saturday Night Live|Host|Episode: "Jon Stewart/India.Arie"|
|2006|78th Academy Awards|Host|TV Special|
|2006|American Dad|Himself|Voice, Episode: "Irregarding Steve"|
|2007|Jack's Big Music Show|Brunk Stinegrouber|Episode: "Groundhog Day"|
|2008|The Simpsons|Himself|Voice, Episode: "E Pluribus Wiggum"|
|2008|80th Academy Awards|Host|TV Special|
|2012|Robot Chicken|Matt Trakker, Serpentor|Voice, Episode: "Executed by the State"|
|2013|Big Time Rush|Himself|Episode: "Big Time Invasion"|

Question: how many more roles did jon stewart have in 1997 compared to 2007?
Answer: 4